
- part no.: 1101101
Plug & Play Kit with clearance as far as the camshaft is concerned. “Piston capacity can only be... more
Big Bore Kit 1070cc Custom
Plug & Play Kit with clearance as far as the camshaft is concerned.
“Piston capacity can only be replaced by even more piston capacity” – this was the adopted motto during the company-internal development of the Siebenrock Big Bore Kit. The goal of this construction was to enhance the motor characteristics which were already outstanding thanks to the Power and Replacement Kits. We didn’t just say this, we went out and did it and the result for all BMW 1000 cc models from 1981 onwards was the 1070 cc Big Bore Kit, which turned out to be the ultimate solution for sporty touring riders. After modification, an amazing 80 hp is available at an engine torque of 92Nm. That’s what we call a convincing result.
This performance boost was achieved using 151 millimetre long, high-stability connecting rods which, when weight-optimized and fitted with ARP screws, only put 450 grams on the scales. Quite apart from this, 98 millimetre, weight-optimized pistons are used which only weigh 428 grams including the rings, bolts and clips. Thanks to the well-designed piston form, it is not necessary to adapt the cylinder head to the big bore.
All of the parts required to mount the kit are included within the scope of delivery.
Camshaft ( our recommendation 1131800 or 1131820) , camshaft seal kit art.no.1114444 and Conrod bearing shell, art.no. 1124460, must be ordered seperately !
With MOT/TÜV approval and installation instruction.
Price for set.
For the classic BMW 2-valve Boxer models R 100, R 100CS, R 100RS, R 100RT, R 100RS Monolever (x), R 100RT Monolever (x), R 100GS (x), R 100R (x).
(x) = only permitted for vehicles up to 31.3.1994.
TIP
The use of dual ignition is strongly recommended.
Ready-to-install camshaft including camshaft gear and front camshaft bearing on request.
“Piston capacity can only be replaced by even more piston capacity” – this was the adopted motto during the company-internal development of the Siebenrock Big Bore Kit. The goal of this construction was to enhance the motor characteristics which were already outstanding thanks to the Power and Replacement Kits. We didn’t just say this, we went out and did it and the result for all BMW 1000 cc models from 1981 onwards was the 1070 cc Big Bore Kit, which turned out to be the ultimate solution for sporty touring riders. After modification, an amazing 80 hp is available at an engine torque of 92Nm. That’s what we call a convincing result.
This performance boost was achieved using 151 millimetre long, high-stability connecting rods which, when weight-optimized and fitted with ARP screws, only put 450 grams on the scales. Quite apart from this, 98 millimetre, weight-optimized pistons are used which only weigh 428 grams including the rings, bolts and clips. Thanks to the well-designed piston form, it is not necessary to adapt the cylinder head to the big bore.
All of the parts required to mount the kit are included within the scope of delivery.
Camshaft ( our recommendation 1131800 or 1131820) , camshaft seal kit art.no.1114444 and Conrod bearing shell, art.no. 1124460, must be ordered seperately !
With MOT/TÜV approval and installation instruction.
Price for set.
For the classic BMW 2-valve Boxer models R 100, R 100CS, R 100RS, R 100RT, R 100RS Monolever (x), R 100RT Monolever (x), R 100GS (x), R 100R (x).
(x) = only permitted for vehicles up to 31.3.1994.
TIP
The use of dual ignition is strongly recommended.
Ready-to-install camshaft including camshaft gear and front camshaft bearing on request.
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Standard sized
For all BMW 2-valve models
For all BMW 2-valve models
€9.90
Prices incl. VAT, plus shipping costs
Part no. 1124460
For BMW R 75 and R 80 models
€48.50
Prices incl. VAT, plus shipping costs
Part no. 1134453
OX36D two-piece Mahle
For BMW 2-valve with oilcooler
For BMW 2-valve with oilcooler
€14.65
Prices incl. VAT, plus shipping costs
Part no. 1142146
38mm
For BMW /6 and /7 models
For BMW /6 and /7 models
€349.00
Prices incl. VAT, plus shipping costs
Part no. 1811214
For BMW 2-valve models
Not for R 45 and R 65
Not for R 45 and R 65
€1.20
Prices incl. VAT, plus shipping costs
Part no. 1134325
Deep shape
For BMW R 45, R 65, R 80ST, R 80G/S
For BMW R 45, R 65, R 80ST, R 80G/S
€189.00
Prices incl. VAT, plus shipping costs
Part no. 3411005
Short Left and right side
For BMW Paralever models
For BMW Paralever models
€29.90
Prices incl. VAT, plus shipping costs
Part no. 5116078
5-speed with kick starter
For BMW models from 9/80 on
For BMW models from 9/80 on
€54.89
Prices incl. VAT, plus shipping costs
Part no. 2300596
For Power Kit 1000cc, Replacement Kit 1000cc
and BMW R 100 models from 9/1980 on
and BMW R 100 models from 9/1980 on
€39.95
Prices incl. VAT, plus shipping costs
Part no. 1100101
For BMW R 100 models
€25.90
Prices incl. VAT, plus shipping costs
Part no. 1134751
For BMW 2-valve from R 75/5 on
Not for R 45 and R 65
Not for R 45 and R 65
€25.90
Prices incl. VAT, plus shipping costs
Part no. 1134234
Right side
For BMW R 80G/S, ST, R 65GS
For BMW R 80G/S, ST, R 65GS
€29.50
Prices incl. VAT, plus shipping costs
Part no. 4663640
45°
For BMW R 80, R 90, R 100
For BMW R 80, R 90, R 100
€58.00
Prices incl. VAT, plus shipping costs
Part no. 1134837
Right side Square-cut Black
For BMW from /7 models up
For BMW from /7 models up
€7.95
Prices incl. VAT, plus shipping costs
Part no. 3272812
Standard red
For BMW 2-valver models
For BMW 2-valver models
€39.50
Prices incl. VAT, plus shipping costs
Part no. 1111155
For all BMW 2-valve models
€5.25
Prices incl. VAT, plus shipping costs
Part no. 1134176
Conrods 151,0 mm
For BMW R100 models from 9/80 on
For BMW R100 models from 9/80 on
€2,750.00
Prices incl. VAT, plus shipping costs
Part no. 1101100
Conrods 150,5mm
For BMW R 100 models from 9/80 on
For BMW R 100 models from 9/80 on
€2,870.00
Prices incl. VAT, plus shipping costs
Part no. 1101110
NEW
Conrods 150,5mm
For BMW R 100 models from 9/80 on
For BMW R 100 models from 9/80 on
€2,590.00
Prices incl. VAT, plus shipping costs
Part no. 1101111
For BMW R 2V models from 9/78 on
€298.00
Prices incl. VAT, plus shipping costs
Part no. 1131800
Left side
For Krauser 4-valve / MKM
For Krauser 4-valve / MKM
€395.00
Prices incl. VAT, plus shipping costs
Part no. 11661002
Plug & Play
For BMW R 100 models from 9/1980 on
For BMW R 100 models from 9/1980 on
€985.00
Prices incl. VAT, plus shipping costs
Part no. 1100103
For BMW 2-valve from 9/78 on
€329.00
Prices incl. VAT, plus shipping costs
Part no. 1131820
Plug & Play
For BMW R 80 models from 9/1980 on
For BMW R 80 models from 9/1980 on
€899.00
Prices incl. VAT, plus shipping costs
Part no. 1100080
Silent Hektik
For BMW models from 9/78 on
For BMW models from 9/78 on
€585.00
Prices incl. VAT, plus shipping costs
Part no. 1200100
With stainless steel push rod tubes
For BMW R 80 models from 9/80 on
For BMW R 80 models from 9/80 on
€985.00
Prices incl. VAT, plus shipping costs
Part no. 1100082
Plug & Play
For R 100 models from 9/75 up to 9/80
For R 100 models from 9/75 up to 9/80
€1,015.00
Prices incl. VAT, plus shipping costs
Part no. 1100105
Wank
For BMW 2-valve models
For BMW 2-valve models
€124.00
Prices incl. VAT, plus shipping costs
Part no. 1133638
98mm complete with 3 rings
€399.00
Prices incl. VAT, plus shipping costs
Part no. 1109022
Plug & Play
For BMW R 100 models from 9/1980 on
For BMW R 100 models from 9/1980 on
€899.00
Prices incl. VAT, plus shipping costs
Part no. 1100100
Standard sized
For all BMW 2-valve models
For all BMW 2-valve models
€9.90
Prices incl. VAT, plus shipping costs
Part no. 1124460
For BMW 2-valve models from 9/78 on
€329.00
Prices incl. VAT, plus shipping costs
Part no. 1131824
SDZ
For BMW 2-valve models from 9/78 on
For BMW 2-valve models from 9/78 on
€585.00
Prices incl. VAT, plus shipping costs
Part no. 1200150
For BMW /5 and /6 models up to 9/1975
€1,029.00
Prices incl. VAT, plus shipping costs
Part no. 1100072
NEW
For Power Kit, Replacement Kit and Big Bore Kit pistons
€22.50
Prices incl. VAT, plus shipping costs
Part no. 1109015
Chrome
For BMW R 80G/S PD
For BMW R 80G/S PD
€1,298.00
Prices incl. VAT, plus shipping costs
Part no. 1812920

Right side
For Krauser 4-valve / MKM
For Krauser 4-valve / MKM
€395.00
Prices incl. VAT, plus shipping costs
Part no. 11661003
Black semi-matt
For BMW 2-valve models
For BMW 2-valve models
€86.90
Prices incl. VAT, plus shipping costs
Part no. 1112246
For BMW 2-valve Boxer models
€119.00
Prices incl. VAT, plus shipping costs
Part no. 1113100
For BMW R 75, R 80, R 90 models
From 9/75 up to 9/80
From 9/75 up to 9/80
€929.00
Prices incl. VAT, plus shipping costs
Part no. 1100084

Left side
For Krauser 4-valve / MKM
For Krauser 4-valve / MKM
€0.00
Prices incl. VAT, plus shipping costs
Part no. 11661902
1st oversize
For Krauser 4-valve / MKM
For Krauser 4-valve / MKM
€170.00
Prices incl. VAT, plus shipping costs
Part no. 11661809
For Krauser 4-valve / MKM
€199.99
Prices incl. VAT, plus shipping costs
Part no. 11661805
For R 65GS, R 80G/S, R 80/100 GS, R 80GS Basic
"Plug and Play"
"Plug and Play"
€299.00
Prices incl. VAT, plus shipping costs
Part no. 6212646
For Big Bore Kit Touring
150,5 mm
150,5 mm
€309.00
Prices incl. VAT, plus shipping costs
Part no. 1109044
Deep shape
For BMW R 45, R 65, R 80ST, R 80G/S
For BMW R 45, R 65, R 80ST, R 80G/S
€189.00
Prices incl. VAT, plus shipping costs
Part no. 3411005
With stainless steel pushrod tubes
For R 75, R 80, R 90, 9/75 up to 9/80
For R 75, R 80, R 90, 9/75 up to 9/80
€1,015.00
Prices incl. VAT, plus shipping costs
Part no. 1100085
For BMW R 100 models
€25.90
Prices incl. VAT, plus shipping costs
Part no. 1134751
With adapter
For BMW GS models
For BMW GS models
€297.00
Prices incl. VAT, plus shipping costs
Part no. 3410490
NEW
For Power Kit, Replacement Kit, Big Bore Kit.
€74.50
Prices incl. VAT, plus shipping costs
Part no. 1109016
For BMW R 2V Boxer models
€2,111.00
Prices incl. VAT, plus shipping costs
Part no. 11001337395.1
Used item / special regulation § 25a UStG
For BMW 2v Boxer models
For BMW 2v Boxer models
€129.00
plus shipping costs
Part no. 11311338303.1
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